Lemma 2.6 [1]}
Let \(N\)  be a natural number and suppose that \(S-T(\mathbb {Z}_{N}/H)\)  holds for every \(\lbrace 0\rbrace \ne H\le \mathbb {Z}_{N}\) . Assume that \((A,B)\)  is a spectral pair and \(B\)  does not generate \(\mathbb {Z}_{N}\) . Then \(A\)  tiles \(\mathbb {Z}_{N}\) .

